. Dalmatius was given control over the buff-yellow central area including Greece and the Balkans.
Constantine II,
Constans I, and
Constantius II were raised to the rank of
caesar, the princes and heirs, by Constantine in 317, 324, and 333 respectively. Constantine raised Dalmatius to the rank of
caesar in
Ripa Gothica on 18 September 335, and gave him control of Thrace, Macedonia, and Achaea. This date coincided with the eleventh anniversary of Constantine's victory at the
Battle of Chrysopolis. At the same time as Dalmatius' appointment, Hannibalianus was made (King of Kings and of the Pontic Races), which would give him some authority over the
Kingdom of Armenia and eastern Anatolia. Dalmatius' appointment as
caesar may have been part of an attempt by Constantine to restore the
Tetrarchy system where four people ruled over the empire. As
caesar Dalmatius was in charge of an army near the
Danube and used
Naissus as his base. Naissus was a central hub in the Balkans and Constantine used it as his base for campaigns against the
Sarmatians and
Limigantes in 334, and was later used by Emperor Julian during his campaign against Constantius II in 361. , a honorific meaning "most courageous", was given to Dalmatius; Constantius II was the only other
caesar to receive this title. Evidence that Dalmatius might have participated in Constantine's
campaigns in Dacia is provided by a coin bearing his name which features a prince holding the legionary standard and triangular dagger (
parazonium) while two prisoners of war lie at his feet. Coinage in the name of Dalmatius was produced in Trier, Lyons, Arles, Rome, Siscia, Thessalonica, Heraclea, Constatinople, Nicomedia, Cyzicus, Alexandira, and Antioch. Dalmatius and his fellow
caesares were included in all imperial laws as superscription, but were removed by the compilers of the 5th century compilation of laws
Codex Theodosianus, who only included the name of Constantine. The chronicler
Theophanes the Confessor claimed that Dalmatius and his soldiers saved patriarch of Alexandria
Athanasius of Alexandria from being murdered at the
First Synod of Tyre in 335, but other historians believe that Theophanes mistook Dalmatius for his father, who was present in Antioch, and the event most likely occurred before Dalmatius was made
caesar. The historian T. D. Barnes believed that
Valerius Maximus was the
praetorian prefect for Dalmatius due to a
rescript featuring his name being removed in 337, but other historians believe that the praetorian prefect removed from this rescript was Valerius Felix and that it was done in 355/356. Flavius Dalmatius might have served as Dalmatius' praetorian prefect, similarly to how
Gaius Furius Sabinius Aquila Timesitheus served as the praetorian prefect for his son-in-law Emperor
Gordian III. ==Death==